body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f1f1f1;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    width: 400px;
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.tabs {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    /*border: 1px solid #ddd;*/
}

.tab.active {
    /*background-color: #f1f1f1;*/
    border-bottom: 3px solid #FF6633;
}

.form-group {
    margin-bottom: 20px;
}

input {
    width: calc(100% - 20px);
    padding: 10px;
    margin: 5px 0;
    border: 0px;
    border-bottom: 1px solid #ccc;
    /*border-radius: 10px;*/
}

button {
    width: 100%;
    padding: 10px;
    background-color: #FF6633;
    color: #fff;
    border: none;
    border-radius: 15px;
    cursor: pointer;
}

button:hover {
    background-color: #E56236;

}

#yanzheng {
    width: 65%;
}

#yanzhengbtn {
    width: 25%;
}

.login {
    margin-top: 10%;
}

.err {
    color: red;
    font-size: 10px;
    display: none
}